Tống Thị Lan
Empress Thừa Thiên (Vietnamese: Thừa Thiên Cao Hoàng Hậu chữ Hán: 承天高皇后, 1762–1814), born Tống Thị Lan(宋氏蘭), was the first wife of Nguyễn Phúc Ánh (future Emperor Gia Long) and mother of Crown Prince Nguyễn Phúc Cảnh.
She was a daughter of general Tống Phước Khuông of Nguyễn lords. Nguyễn Ánh married her when he was at the age of 18. Empress Thừa Thiên had two sons with Gia Long: Nguyen Phuc Chieu (who died after several days) and Nguyễn Phúc Cảnh.
After her death, she was given the title of empress and buried at Gia Long's Thiên Thọ tomb, alongside the Emperor.
- Tôn Thất Bình (1997). Kể chuyện chín Chúa mười ba Vua triều Nguyễn (in Vietnamese). Da Nang: Đà Nẵng Publishing House. pp. 45–47.